Wycombe Wanderers remained top of League Two with a stunning victory over 10-man Southend United.
Despite falling behind, Paris Cowan-Hall got the Chairboys back on track to make it three goals in the last three games for the lively winger.
Something very close to an own goal from Jerome Binnom-Williams put the Blues ahead seconds before the break, and it got worse for the visiting full-back when he was dismissed for a reckless challenge on Josh Scowen just after the hour.
Joe Jacobson then showed what a trusty left he has when he curled a fantastic free-kick over the wall and in - despite a despairing hand from keeper Dan Bentley.
Matt McClure piled on the misery with a left-foot rocket every bit as deadly as Jacobson's, and just as far from goal.
“The early goal wasn’t such a bad thing,” said Ainsworth.
“You’ve got plenty of time to put it right and it gives you a real kick up the backside, even though I’m not sure we needed it – it was that early.
“The way we responded, I was really pleased, and all the hard work this week came into place.
“Southend were one of the favourites before the start of the season, they’ve got a big budget, and in Phil Brown, they’ve got a great manager.”
Wycombe are now two points clear of Burton Albion and boast a game in hand on the Brewers.